Programmer Group

I. Guide Package: <dependencies> <dependency> <groupId>com.alibaba.boot</groupId> <artifactId>dubbo-spring-boot-starter</artifactId> <version>0.2.0</version> </dependency> <dependency> <groupId>org. ...

public understanding When you don't specify the modifier in the program, it defaults to public, which means it can be accessed both inside and outside the class. Let's use the following example to explain. class Person{ name:string sex:string age:number // Default is public constructor(name:string, sex:string, age:number){ ...

Title gate Title number A B C D E F G H I J state . . . Ø . Ο . Ο . . D.Kth Minimum Clique The undirected graph of n points is given. Each point has a weight. What is the weight of the smallest clique? Idea: put all the individual points into the priority queue, take out the points at the top of the h ...

Preface The Editor.md plug-in has been used as the editor of the blog, which is very good. However, when editing in full screen, you can click the button only when you want to preview or save it in the non full screen state. It's uncomfortable to use it, so it took a little time to add three buttons on the toolbar, preview, save and publish. He ...

Take the bead as the point, if the condition is satisfied, two sides are connected. So you can find the maximum number of nodes that can be covered by n paths. As we all know, minimum edge coverage = total number of points - Maximum Matching Not here Link So split the points and run the bipartite chart. It'S about S to x. The k-direction x 'con ...

Jitter prevention and throttling of native JavaScript implementation functions Reference: https://www.jianshu.com/p/c8b86b09daf0 I want to know more about the link on the direct stamp. It's very clear. Below is just the code and my own comments to help understand the logic behind the implementation. Debounce (anti shake) The so-called anti sha ...

To use redis in go language, you need to download the official redis toolkit. Execute in the go path path: go get github.com/garden/redis/redisIf git is not installed, you can download a zip package from the following link, and then unzip it to the local gopath path path. If you don't know the path of gopath, look at the configuration parameter ...

The tutorial comes from:PHP Chinese net tutorialPHP manual (Simplified Chinese) link on PHP official website if conditional statement The program runs strictly according to the process Three basic mechanisms: sequence judgment, condition judgment and cycle structure if (true) { echo 'really'; } echo ...

1. Group by a column to determine whether there are duplicate columns. # Count the unique variables (if we got different weight values, # for example, then we should get more than one unique value in this groupby) all_cols_unique_players = df.groupby('playerShort').agg({col:'nunique' for col in player_cols}) For the. agg function: D ...

namenodelists="nnip1,nnip2" nn1=$(echo $namenodelists | cut -d "," -f 1) nn2=$(echo $namenodelists | cut -d "," -f 2) nn1state=$(curl "http://$nn1:50070/jmx?qry=Hadoop:service=NameNode,name=NameNodeStatus"|grep -c active) nn2state=$(curl "http://$nn2:50070/jmx?qry=Hadoop:service=NameNode,name=NameNodeStatus"|grep -c active) source /etc ...